Here the sun is only 5° above the horizon. Again, the parhelic
circle is faint beyond the 120° parhelia - then it brightens
again..

The two bright regions 150
to 160° from the sun are Liljequist parhelia first observed in
Antarctica by the Swedish meteorologist G.H. Liljequist. Almost perfect
hexagonal plate crystals are needed to form them. Their ray paths
involve two internal reflections. An example is a ray entering face
3, reflecting off faces 7 then 6 to exit through face 8 (path 3768
see face
number key). There is net refraction in this ray path and the
Liljequist parhelia are slightly coloured.

40° high sun

Contrast the parhelic circle as the sun climbs higher. The rays strike
internal vertical faces more obliquely and are more efficiently reflected.
The circle becomes more uniform.